abdullah gilani

Lubricants Lubricant is a substance that reduces friction and wear between mutually contacted surfaces, which ultimately reduces the heat generated when the surfaces move. A lubricant can be in solid, liquid, and gas, or even semisolid (grease) forms. The liquid lubricants can be classified based on the base oil from synthetic/semi-synthetic, mineral, or environmentally acceptable (biodegradable) oils. Each of these engine oils has a different composition: the base is either refined crude petroleum or polymers manufactured in the laboratory. Types of Lubricants: Lubricants